Horizontal scroll in edit post done by edit tweet 'box'

update: it is not theme dependent, it also happens in TwentyFourteen.

update: could be solved (in between solution) with:

#side-sortables #wp2t .jtw textarea {
height: 120px;
width: 100%;
}

Set the width to 100%

Thanks for catching that – will get an update out shortly.

Thanks for the update!

No problem!